1281752068457 has 4 divisors (see below), whose sum is σ = 1464859506816. Its totient is φ = 1098644630100.

The previous prime is 1281752068453. The next prime is 1281752068543. The reversal of 1281752068457 is 7548602571821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1281752068457 - 2² = 1281752068453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1281752068453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91553719169 + ... + 91553719182.

It is an arithmetic number, because the mean of its divisors is an integer number (366214876704).

Almost surely, 2^{1281752068457} is an apocalyptic number.

It is an amenable number.

1281752068457 is a deficient number, since it is larger than the sum of its proper divisors (183107438359).

1281752068457 is an equidigital number, since it uses as much as digits as its factorization.

1281752068457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183107438358.

The product of its (nonzero) digits is 7526400, while the sum is 56.

The spelling of 1281752068457 in words is "one trillion, two hundred eighty-one billion, seven hundred fifty-two million, sixty-eight thousand, four hundred fifty-seven".